These natural nipples make bottle feeding easy for you and the baby. Features:• Natural latch on due to the wide breast shaped nippleThe wide breast shaped nipple promotes natural latch on similar to the breast, making it easy for your baby to combine breast and bottle feeding.• Unique Petals for a soft, flexible nipple without collapsePetals inside the nipple increase softness and flexibility without nipple collapse. Your baby will enjoy a more comfortable and contented feed.• Advanced anti-colic system with innovative twin valveInnovative twin valve designed to reduce colic and discomfort by venting air into the bottle and not baby’s tummy.• BPA free - The Philips Avent Natural bottle is made of BPA free* material (polypropylene). Age: 6months+